A Finnish anti-piracy group said yesterday that it had received a bomb threat for its role in blocking The Pirate Bay in Finland.

Banning the torrent site has set off a train of reprisals, including the bomb threat. The Copyright, Information and Anti-Piracy Centre (CIAPC) told The Register that it had received an email – signed "Anonymous Finland" – threatening to bomb its offices in central Helsinki sometime this week.

Yes, we received a bomb threat via e-mail on Monday, shortly after there was a ddos-attack by Anonymous Finland against our webpage. The email gave a fairly thorough description of the bomb.

It was signed by the slogan used by Anonymous:

Freedom is Ours. We Do Not Forget. We Do Not Forgive. We Are The Anonymous.

The Finnish branch of Anonymous Finland announced yesterday, on their Twitter feed, that Anonymous is not behind the e-mail.

Anyway, the bomb threat was immediately reported to the police. We have no other option that to take this kind of threat seriously, regardless of where it has come from.

Anonymous Finland had been mobilising sympathisers to rain down internet vengeance on the CIAPC and music industry body the IFPI, which recently won a court ruling to get filesharing site The Pirate Bay blocked. On Monday, Finnish internet provider Elisa complied with the court order and blocked its 2.2 million users from accessing The Pirate Bay.

While the Finnish contingent of the Anonymous crew doesn't condone violence, it does condone hacking, and the group claims to have taken down the websites of the two organisations - which are still down at time of writing. It has also published – via its Twitter feed – the phone number of Tommi Kyyrä, the deputy director of the IFPI, instructing Twitter followers to "melt his mobile".

IFPI, We ain't kiddin. We've the means & all the time of the world to wipe You out. U'll bankrupt to fix the mess We'll cause You #elisagate

Finnish radio station Ylex interviewed KillEmWithLazers - a Twitter user claiming to be a member of Anonymous Finland. He said that his hatred of censorship motivated the attacks and that a combination of a bot and a few bugs on the company's servers left it open to being downed by the hackers.